Afair coin is flipped seven times. what is the probability of the coin landing tails up at least two times? a. 319/512 b. 15/16 c. 251/256 d. 219/256

Anne is twice as old as bill, and bill is 3 years older than christie. the sum of anne s and christie s ages equal 72. find their age difference.?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.